Thermostatically operated shutter for air cooled engines



E. S. MARKS Oct. 27, 1931.

Filed Feb. 2, 1929 3 Sheets-Sheet l INVENTOR ATTORNEY Oct. 27, 1931. 5 E. s. MARKS 1,829,048

I THERMOSTATICALLY OPERATED SHUTTER FOR AIR COOLED ENGINES I Filed Feb. 2, 1929 :5 Sheets-Shee t' 2 v INVENTOR wag/m ATTORNEY Oct. 27, 1931. E. s. MARKS 1,829,048

THERMOSTATICALLY OPERATED SHUTTER FOR AIR COOLED mamas Filed Feb. 2, 1929 3 Sheets-Sheet 5 INVENTOR ATTOR N EY Patented Oct. 2 7, 1931 UNITED STATES PATENT OFFICE EDWARD S. MARKS, OF SYRACUSE, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS,

TO FRANKLIN DEVELOPMENT CORPORATION, OF SYRACUSE, NEW YORK, A. COR- PORATION OF NEW YORK THEBMOSTATICALLY' OPERATED SHUTTER FOR AIR COOLED ENGINES Application filed February 2, 1929.

This invention relates to thermostatically operated shutters for automobile engines and has for its object, a thermostat mechanism by which the shutters are operated solely by the heated air passing from the cylinders of an air cooled engine and is not materially affected by the temperature of the air under the hood.

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawings in which like characters designate. corresponding parts in all the views.

Figure 1 is a fragmentary side elevation, partly in section, of an air cooled engine embodying this invention.

Figure 2 is an enlarged fragmentary detail view of the shutter mechanism.

Figure 3 is an enlarged detail sectional view of a thermostat.

Figure 4 is an enlarged fragmentary vertical sectional view of the engine cylinders and the thermostat showing the relative position of the thermostat to one of the cylinders of the engine.

Figure 5 is a transverse sectional view through one of the cylinders showing the relation of the thermostat to the cylinder.

Figure 6 is a front elevation of the engine hood.

This invention comprises generally, a thermostat located in the path of the heated air after it passes over the cylinders or oneof the cylinders of an air cooled engine for controlling the operation of shutters arranged adjacent the open front wall of the hood of the engine, these shutters controlling the flow of air under the hood as well as into the inlet of the fan or blower which supplies the cooling air current to the cylinders.

I have here shown my invention as applied to the Franklin air cooled engine and as automobile engines are of a multi-cylinder type, I have shown the invention as applied to a multi-cylinder engine.

1 designates the cylinders. 2 is the crank case. 3 is the usual hood, and 4 the open Serial No. 337,097.

front wall of the hood which is usually covered by open or grill work.

The cylinders l are provided with radial heat radiating flanges 5 and with jackets 6, the jackets being formed by angularly turned flanges at the outer edges of the fins 5. The fins in the jackets terminate short of the crank casing or at the lower end of the combustion chamb'er. Air is blown downwardlyover the cylinders by a fan or rotor 7 usually mounted on the crank shaft, the fan being located in a housing 8 having an upwardly extending outlet 9 which communicates with an air conduit 10 extending over the heads of the cylinders and arranged to discharge into the upper ends of the jackets.

The fan housing 8 has an inlet 8 presented.v toward the open front wall 4.

The construction of the engine forms no part of this invention.

The shutter mechanism per se, may be of any suitable form, size and construction and per se, forms no part of this invention.

The shutter mechanism here shown, includes horizontally extending shutters 11 arranged one above the other in a suitable frame 12 fitted in the shell or frame 12 of the front wall 4, each shutter having a bracket 13 at each end pivoted at 14 t0 the shutter frame, and an angular arm 15 toward the free edge of the shutter which is pivoted at 16 to a vertically movable rod or bar 17. It will be understood that there is a bar 17 at each end of the shutters.

One of the bars 17 is connected to the thermostatically actuated means and as here illustrated, one of the bars 17 is provided with a bracket 18 extending rearwardly thereof to which is pivoted at 19 one arm of a lever 20 which is pivoted at 21 to a bracket 22 secured to one of the upright members of the frame 12. The other arm of the lever is pivoted at 23 to a link 24 forming part of the motion transmitting means between the thermostat and the shutter.

In Figure 2, the shutters are shown as closed. When the thermostat to be presently described expands, it transmits a forward movement to the link 24 moving the upper end of the lever 20 forwardly and the lower ,end or pivot 19 rearwardly in a rearwardly and upwardly extending arc. .This movement moves the bar 17 in an upward and reara-let, athermostat mounte ward direction thus moving the arms 15 of the supportingbrackets for the shutters upwardly and rearwardly and opening the shutters inwardly about their pivots 14. This movement of the bar 17 is against the action of a returning spring 25. I

26 designates a thermostat of any suitable construction, here shown as of the bellows type and containing any suitable thermostatic fluid. It is enclosed in a suitable casing 27 which is mounted by brackets 28, 29 on the crank case of the engine. One of the heads 30 of the thermostat is movable during the expansion and contraction of the thermostat. and the movement thereof is transferred to the shutters of the link 24 through a sliding stem 31 connected to the head 30 and extending through the head of the casing 27, a link 32 connecting said stem 31 to one arm 33 of an angle lever pivoted to the crank case, the other arm 34 of the angle lever being connected to the rear end of the link 24:.

The thermostat is arranged adjacent one of the cylinders below the jacket of that cylinder in the path of the heated air projected from the jacket and the casing is provided with openings 35 on its side toward the cylinder, these openings being arranged so that the thermostat is subject to the heat from the cylinder and to the air blowing down through the jacket of the cylinder. The casing 27 shields the thermostat from the influence of the air under the hood so that it is sensitive only to the heated air passing through the cylinder jacket.

operation, as the thermostat expands under the heat of the heated air current from the cylinders of the engine, the motion thereof is transferred to the shutter mechanism to open the shutter mechanism and when the thermostat cools under the'influence of the air projected to the cylinders being cooler than a predetermined temperature, the thermostat contracts and the shutters close more or less. The shutters not only control the flow of air under the hood, but also through the fan casing, but the operation of the shutters is controlled solely by the temperature of the air that passes through the fan housin and over the cylinders.

hat I claim is:

1. The combination of an air cooled in-' having an inlet opening toward the said front wall, shutters mounted adjacent said front wall and exte. din across the air inon the engine adjaccnt the cyl nder and below .the jacket thereof in the path of the heated air passing from the 'acket, the thermostat having a casing for s ielding it from the air under the hood and having an opening presented to- Ward the cylinder and in the path of the air projected from the jacket and motion transmitting means between the thermostat and the shutters to operate them.

2. The combination of an air cooled internal combustion engine, a hood enclosing the engine and having an open front wall, the engine cylinder having heat radiating flanges, the engine also having means for blowing air over the flanges, said means having an inlet opening toward the front Wall, shutters mounted adjacent said front wall and extending across the air inlet, the thermostat mounted on the engine adjacent the cylinder flanges in the path of the heated air passed over the cylinder and the flanges, the thermostat having a casing for shielding it from the air under the hood and having an opening presented toward the cylinder in the path of the heated air passing from the flanges, and motion transmitting means between the thermostat and the shutters to operate them.

In testimony whereof, I have hereunto signed in name, at Syracuse, in the county of Onon a a, and State of New. York, this 28th day 0 J an'uar 1929.

E WARD S. MARKS. 

